Phillip o connor



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P. UGONNOR. BAND sAwING MAGHINB.

No. 490,21?. Patented Jan. 17, 1893.

UNITED STATES PATENT @einen PlllLLlP OOONNOR, OF MILXVAUKEE, WISCONSIN,ASSIGNOR OF ONE-HALF TO FREDERICK R. SKIDMORE, OF SAME PLACE.

BAND sAwlNe-MAci-HNE.

SPECIFICATION forming part of Letters Patent No. 490,212, dated January17, 1893.

Application led May 5, 1892. Serial No. 431,888. (No model) To @ZZ whom15 'muy concern:

Be it known that I, PHILLIP OCoNNoR, a citizen of the United States,anda resident of Milwaukee, in the county of Milwaukee, and

in the State of lVisconsin, have invented certain new and usefulImprovements in Band Sawing-Maohines; and I do hereby declare that thefollowing is a full, clear, and exact description thereof.

1o My invention relates to new and useful improvements in sawingmachines, and relates more particularly to improvements in that class ofsuch machines known as band sawing machines.

The'invention consists in the matters hereinafter described and pointedout in the appended claims.

In the accompanying drawings illustrating my invention: Figure l is acentral vertical zo sectional view of a machine constructed inaccordance with my invention, said section being taken on line l-l ofFig. 2. Fig. 2,.is avertical sectional view of the saine taken on line 22 of Fig. l. Fig. 3, is a horizontal secz 5 tional view of a portion ofthe machine, taken on line 3-3 of Fig. l. Fig. i, is a verticalsectional view taken on lin'e '1t-4 of Fig. 2. Fig. 5, is a horizontalsectional view taken on line 5-5 of Fig. 6, Fig. 6, is a sectional View3o taken on line 6-6 of Fig. 5. Fig. 7, is a vertical sectional viewtaken on line 7--7 of Fig. l. Fig. 8, is a top plan View of the bearingforthe shaft of the upper saw-carrying pulley.

In said drawings, A represents the saw table 3 5 mounted uponsuitablelegs or supports A A', B the frame upon which the saw carryingpulleys O C are journaled, and O represents the saw. One of the sawcarrying pulleys, C, preferably the upper on e, is made adjustable 4owith respect to the other for the purpose of keeping the band saw tight,and to this end, said pulley is journaled upon a stud shaft c which issecured within a suitable block c adjustably mounted upon the upper endB of the frame B, and a set screw C2 is arranged to bear against saidblock so as to crowd the same with the said wheel away from the otherwheel so as to increase the tension upon the saw. The frame B is madethroughout its 5o length, substantially upon the arc of a circle struckfrom the point where the band saw passes through the table A, as acenter, and the lower part D of said frame is preferably movably engagedwith suitable stationary hangers depending from said table, saidconnection being made in such manner as to permit the frame to bevibrated about said pointY of engagement with the hangers, so as tocause the saw to be moved to anydesired angle with respect to the tableA. 6o

In the particular form of construction illustrated in the drawings,hangers E E formed upon arcs of circles struck from the slot e, wherethe saw passes through the table, as a center, are provided at oppositeends of the said slot, and the lower part Dv of the frame isconveniently made in duplicate, and each part thereof provided with arcshaped bearings D D adapted for engagement with said arc shaped hangersE E, suitable flanges 7o d d being provided upon the bearings D D andarranged to engage with the inner and outer curved edges of the hangersas shown. The two halves D D of .the lower part of the saw carryingframe are provided with trans- 7 5 versely extending sleeves d CZadapted to engage with each other at their inner ends when the saidparts are secured together in their proper relative positions, andthrough these sleeves are passed suitable bolts d2 d2 8o by means ofwhich the two parts D D of the frame are securely held together and inengagement with the arc shaped hangers E E in an obvious manner.

At a suitable point in the bottom of each of the parts D D of the frame,is provided a suitable bearing d3 for one end of the shaft D2 of thelower saw carrying pulley C, which pulley is arranged to revolve betweenthe two parts D D of the frame. One end of the shaft 9o D2 is arrangedto project beyond the bearing d3 and carries a drive pulley F, and astud shaft f is secured upon the frame D adjacent to the center of itsrotation and arranged to project beyond said frame and carries a pulg5ley F. A driving beltf is trained over the pulleys F and F', and theusual tight and loose pulleys F2 F3 are provided upon the outer end ofsaid shaft f, to which pulleys the main driving belt is applied in afamiliar manner. roo

As illustrated in the drawings the curved saw carrying frame B, isprovided upon one side with a suitable rack of teeth G, and a pinion Gis mounted upon a shaft g beneath the table and arranged to engage withthe teeth G upon the frame, said shaft g being arranged to extend to aconvenient point beyond the side of the table A and provided with asuitable operating handle g', by which said shaft may be rotated ineither direction desired.

Suitable ribs g2 g2 are conveniently formed upon opposite sides of thecurved or are shaped frame B as shown more particularly in Figs. l, and5, and are shaped guides I-I provided with correspondinglyshaped groovesh 7L are provided upon the stationary part of the machine frame, saidguides being conveniently composed of two similar plates arranged toembrace the arc shaped frame B as shown and to permit of a longitudinalmovementot` said frame in either direction, therein. It follows fromthis construction that, by rotating the shaft g and pinion Gin onedirection, the frame B will be moved upwardly within the guides, thelower part of the frame swinging upon the arc shaped hangers E E, in anobvious manner, the upper saw carrying pulley being moved forward so asto cause the saw to run obliquely. By an opposite rotation of the pinionG', the frame B will obviously be adj usted downwardly in the guides soas to give an opposite inclination to the saw.

It will be observed that, the frame B and the guides therefor as well asthe arc shaped hangers E E, being formed upon arcs of circles concentricwith the slot e for the saw, the adjustment of the frame in eitherdirection will cause the saw to run at an angle but the saw will alwaysrun through the central point of the said concentric circles andconsequently will always run true in the slot.

By my improved construction I am enabled to adjust the saw frame so asto cause the saw to run at any desired angle to the vertical and thuscut upon any desired bevel. The saw frame may be set to cause the saw tocut upon a bevel either before the work is fed to the saw or while thework is being cut. This feature is especially valuable in machinesdesigned for sawing heavy timbers where it is desirable to have the samerest firmly upon the saw table7 as for instance, in shaping ship timbersor other irregularly shaped pieces. If desired the saw may be startedinto the work so as to cut at one angle to the vertical, and asthe workis fed to the saw, the saw frame may be gradually adjusted in the otherdirection, so that by the time the timber has been passed beneath thesaw, the saw will have been moved so as to cut upon an oppositelyinclined angle, thus enabling me to give to the work any desired form.

My improved machine is furthermore very simple and strong in itsconstruction, and cheap to manufacture.

While I have shown the hangers EE as arranged upon opposite sides of theslot for the saw, and the two parts D D of the lower portion of theframe as arranged upon opposite sides of the saw, I would have itunderstood that the arrangement of said parts may be varied in anydesired manner so as to afford the necessary bearings for the shafts ofthe several pulleys.

Various other modifications may be made in details of constructionwithout departure from my original invention.

Having described my invention, what l claim as new and desire to secureby Letters Patent of the United States is:-

l. A band sawing machine comprising a stationary table slotted for thepassage of the saw, one or more arc-shaped hangers concen tric with saidslot and secured to the lower side of said table, a frame provided witharc shaped grooves and arranged to embrace said hangers, a curved armextending upward from said frame to a point above the table. pulleysjournaled, respectively, upon the frame below the table, and upon saidcurved arm above the table, and a saw trained over said pulleys,substantially as set forth.

2. A band sawing machine comprising a stationary table slotted for thepassage of the saw, arc-shaped hangers, concentric with said slot andsecured to the under side of the table upon opposite sides of said slot,a two-part frame provided with arc shaped grooves adapted for engagementwith opposite sides of said hangers, an arc-shaped arm also concentricwith said slot, and extending upward from said frame, pulleys journaled,respectively, upon the said frame below the table. and upon thearc-shaped arm above the table.

and a band saw trained over .said pulleys. f

substantially as set forth.

3. A band sawing machine comprising a stationary table slotted for thepassage of the saw, arc-shaped hangers, concentric with said slot andsecured to the under side of the table upon opposite sides of said slot,a two-part frame provided with are shaped grooves adapted for engagementwith opposite sides of said hangers, an arc-shaped arm also concentricwith said slot, and extending upward from said frame, pulleys journaled,respectively, upon the said frame below the table, and upon thearc-shaped arm above the table. a band saw trained over said pulleys, auactuating pulley on the axis of the lower saw carrying pulley, and adriving pulley journaled upon said frame, substantially asset forth.

4. A band sawing machine comprising a stationary table slotted for thepassage of the saw, one or more are shaped hangers concentric with saidslot and located upon the under side of the table, an arc shaped framealso concentric with said slot and movably engaged below the table withsaid hangers and extending upwardly through suitable guides upon thetable, pulleys journaled upon said frame above and below said table andIIO carrying abancl saw, an actuating pulley upon the county ofMilwaukee and State of Wiscontlie axis of the loweil saw carrying pulleyand sin, in the presence of two witnesses.

a driving pulley journaled upon said frame v t adjacent to its point ofengagement with the PHILLIP O COB NOR 5 hangers, substantially as setforth. Witnesses:

In testimony that I claim the foregoing I VJOHN E. WILES, have hereuntoset my hand, at Milwaukee, in H. G. UNDERWGOD.

